Posts Tagged ‘Chill Hours’

Bare-root for YOUR area!

Thursday, January 14th, 2010

Here at Peaceful Valley, we are in the throes of bare-root sales. However, the terms and restrictions for what can and cannot be planted can be confusing, especially for the first time grower.

The first thing to consider is your growing zone. This is a general description of how warm or cold your temperatures get year round. Where people tend to get confused, even experienced growers, is that in the US, there are two different forms of zone charting: The USDA and Sunset Magazine, possibly more. For simplicity, Peaceful Valley employs the USDA chart exclusively.

How, then, can you find, with any certainty, what USDA zone are you in? You can find zone maps in many locations, but even those cannot be as specific as you need. Fortunately, the good folks at the National Gardening Association have put together a searchable zone chart! Simply go here, and enter your zip code. You will get not only your USDA zone, but links to articles pertaining to growing conditions in YOUR area!

Another question many people have is “How many chill hours do I have? What is a chill hour, anyway?” According to Dave Wilson (the company that has supplied the majority of our bare-root trees for nearly a decade, and services many other nurseries around the nation) a chill hour is defined as one hour under 45 degrees Fahrenheit. However, its not always that simple. For every hour over 60 degrees, you have to subtract one hour. There are other, more specific rules (search for Utah Model Chill), but this is a good general guide.

Now, most people don’t sit out with a clipboard and a thermometer every day, calculating chill data. So, to get your approximate number of chill hours, you would go to your local Ag department — they usually have that data. If you are lucky enough to live in California, our wonderful UC system actually has monitoring up and down the state, with not only recent data, but in some cases, going back 5 years — you get a great picture of trends. The website, broken down by county, can be found here.

As always, we are here to help. Our catalog features many different icons to give you an idea of what grows well in warm climates (ideal for areas like Los Angeles), and what grows well in frigid areas, like Nebraska. But remember, we cannot hold shipments until it gets warm enough for you to plant. There is a method called “heeling in”, which allows you to care for your bare root plants until you are able to plant them in their permanent home. The literature we send out with our plants includes that information, but it can be viewed by downloading the .pdf file on the description page of all our bare-root stock.

Good luck, and Happy Planting!

Q: Questions About Kiwi and Persimmon.

Thursday, November 19th, 2009

A PVFS Customer Email – Staff answer.

Question:

I am very ineterested in buying a couple Persimmon – Fuyu-Jiro (Standard) trees and I have a few questions.  Do these type of trees need pollination? Can they grow well in Southern CA? We live in San Diego County, 2 miles away from the ocean. Also, I would like to learn about Kiwwi. the same questions. Thank you!

Answer:

The Fuyu-Jiro Persimmon does not need a pollinator.  They grow within USDA zones 7-9 as long as you get 200 hours of chill time for them, they should do fine.

Also, the Kiwi doesn’t need a pollinator, both male and female flowers are on the same vine.  I’ve attached your local Master Gardener’s Extension office, they may have better information particular to your area then I have available to me.

Take a Look at the Master Gardeners National Website here.

Hope this helps.

Q: Appropriate Fruit Trees for Planting Zone

Thursday, October 29th, 2009

A set of  PVFS Customer Emails with Staff Responses.

Question:

I received my fall 2009 catalog and see you carry Redhaven peach trees. I would like to know if they come on Citation rootstock or, if not, what rootstock do they come on?

Answer:

Yes, the Redhaven Peach trees come on Citation rootstock. The bare root trees are available for order now, but will not begin shipping until December. Please feel free to contact me directly with any further questions.

Thank you for your interest and happy Fall!

Question:

I have a few more questions.  I live in The Scott Valley In the Siskiyous, Sunset zone 1.  We get about 90 days between 3 day freezes. I would like to know if my selections will be alright.  1) Harcot on Citation, 2) Chinese on Citation, 3) Italian/Europ Plum on Citation, 4) Craig’s Crimson Cherry?   Also will Harcot or Chinese polinate Tomcot?

Answer:

Sunset zone 1 indicates that you are in a very northern hard freeze area?  I’m afraid I am unable to determine where you live?  The Harcot & Chinese recommends within zones 4-9.  The Tomcot is recommended in zones 7-9.  This would suggest that these trees would not survive the winters.  Do you have a local Master Gardener’s Cooperative in your county?  They could probably help with the local particulars.

Please write back with high and low average temps and your location so I can better serve you.

Question:

Thanks again for your help.

I live in Etna CA. US zone 7, sunset zone 1, but I buy all my trees for zone 4. We have vary short season so it can get pretty cold early in september. I already have a Tomcot apricot and need to know if Harcot or Chineese will polinate Tomcot? and will Italian/Europ Plum do alright here?

Answer:

Looks like the Italian/Euro Plum will do fine in your area, it’s recommendation is for zones 4-9, it blooms late (this is good), and does well in colder regions.

The Tomcot is semi self fruitful but will yield more fruit with any other Apricots in the area.  So you should see more fruit with either the Chinese or Harcot nearby.

The Cherry tree you inquired about may have some challenges with the freezing, if you can put it on a south side close to a building it may do alright, it is zoned for areas 5-10.  The Montmorency and the Van are the only Cherries zoned 4-9.  The Montmorency is self-fruitful, the Van needs pollination by any other sweet cherry.

See our Bare Root Planting Guide here.

Q: Growing Blueberries

Tuesday, May 26th, 2009

Question:

Dear Expert,

I am new to gardening, and I’ve had a little luck with the usual
suspects: tomatoes, peppers, onion and so forth. I would like to
plant blueberries next year. I live in Santa Monica, California and
would like to know if the sharpblues have any hope of thriving there.
If so, when can I get them from you and what exactly do I need to do
to create the right conditions. I understand that in CA we have too
much alkaline in our soil, but I don’t know how to prepare the
appropriate recipe in buckets to grow blueberries. I have compost
here. Can you help me?

Thank you,

Answer:

I looked up the data on Chill Hours for your area, and it seems to me that Sharpblue requires more than your climate could give (look here for California Chill hours by County). Chill hours are the number of hours below 45 degrees between November and February, many fruit trees and bushes need a certain amount of these hours in order to set fruit. The blueberries we carried last year with the lowest chill hours are the Misty and the O’Neal (you need at least two different varieties for pollination). However, when you receive the Fall catalog, you may find new varieties with low chill hours. You can sign up to receive a catalog if you don’t already at www.groworganic.com. We have blueberries in the winter, sold as “bare root” because they are dormant, but you can order in Fall when you get the catalog.

As far as growing in containers, you might consider using 2/3 Peat moss and 1/3 potting soil, as well as an acid fertilizer (you could throw in some compost if you’d like). We have a good fertilizer called the “Acid Mix”.

Hope that helps! Thanks for growing organically!

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Check out these Useful websites.

Friday, September 26th, 2008

-Find a Master Gardener near you to help answer location specific questions about your garden’s health.

-Identify Bugs with this picture guide!

-U.C. Davis Pest Management.

-Figure out which plants are best to plant in your area by finding the USDA Hardiness Zone for your area. Or a different Zone finder here.

-California Chill Hours for fruit trees.

-Botanical Gardens in the U.S. (Botanical Gardens near you are a great resource for answers, especially for obscure questions only known by botanists who speak the language of plants).


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